I am in the process of purchasing an international T340 crawler with the Drott 4in1 bucket. Current owner knows pretty much nothing about it as he inherited it through a relative's death. There's no battery in it at this time but from what I've researched,its originally a 6 volt system. I would like to at least see it turn over and possibly fire, but dont want to spend the money on a new battery for nothing. Is it possible to put a 12 volt battery in it or will that cause more harm than good? Also, I dont have a serial number. One more question, negative or positive ground? The ground cable appears to be the smaller of the 2 which leads me to believe its negative ground. Any help is appreciated.